Fluke 925 Anemometer User Manual

Product Overview

The Fluke 925 digital anemometer is designed for precise measurement of wind speed, air flow, and wind temperature. Its unique design features a separate air flow sensor and display unit, providing users with enhanced flexibility for measurements in various locations. This instrument is ideal for professionals requiring accurate environmental data.

Figure 1: The Fluke 925 Anemometer, showing the main display unit connected to the vane sensor.

Setup and Assembly

Unpacking

Carefully remove all components from the packaging. Verify that all items listed below are present and undamaged.

• Fluke 925 Anemometer Display Unit
• Vane Sensor with coiled cable
• Instruction Guide
• 9V Battery (pre-installed or included separately)

Battery Installation

The Fluke 925 Anemometer requires one 9V battery for operation. The battery compartment is typically located on the rear of the display unit.

1. Locate the battery compartment cover on the back of the display unit.
2. Slide or unclip the cover to open the compartment.
3. Insert the 9V battery, ensuring correct polarity (+ and - terminals).
4. Replace the battery compartment cover securely.

Connecting the Vane Sensor

The vane sensor connects to the main display unit via a coiled cable with a connector.

1. Align the connector on the vane sensor cable with the corresponding port on the top of the display unit.
2. Gently push the connector into the port until it clicks or is firmly seated.
3. Ensure the connection is secure to prevent intermittent readings.

Figure 2: The Fluke 925 Anemometer showing the display unit and the separate vane sensor, ready for connection.

Operating Instructions

Powering On/Off

• To power on the device, press the POWER button (usually marked with a circle and a vertical line).
• The device features an auto power-off function after 20 minutes of inactivity to conserve battery life.
• To manually power off, press and hold the POWER button.

Display and Measurement Units

The Fluke 925 features two LCD screens for displaying measurements. You can select various units for wind speed, airflow, and temperature.

• Wind Speed Units: ft/m (feet per minute), m/s (meters per second).
• Airflow Units: CMS (cubic meters per second), CFM (cubic feet per minute).
• Temperature Units: °C (Celsius), °F (Fahrenheit).
• Use the UNIT SETUP button to cycle through and select desired measurement units.

Measuring Wind Speed

1. Ensure the vane sensor is connected.
2. Point the vane sensor directly into the airflow you wish to measure. Ensure the fan blades rotate freely.
3. The wind speed reading will be displayed on the LCD screen.
4. To hold the current reading on the display, press the HOLD button. Press again to release.

Measuring Airflow (CMS/CFM)

To measure airflow, you typically need to input the area of the duct or opening through which the air is flowing.

1. Press the FUNC button to select the 'FLOW (area)' mode.
2. Use the UNIT SETUP button to input the cross-sectional area of the measurement point. Refer to the instruction guide for detailed steps on area input.
3. Position the vane sensor in the airflow. The device will calculate and display the airflow in CMS or CFM.

Measuring Wind Temperature

The Fluke 925 also measures the temperature of the air passing through the vane sensor.

• The temperature reading is typically displayed simultaneously with wind speed or airflow on one of the LCD screens.
• Ensure the device has stabilized in the environment for accurate temperature readings.

Figure 3: Proper handling of the Fluke 925 Anemometer during operation, showing the display unit and the vane sensor.

Maintenance

Cleaning

• Wipe the exterior of the display unit and vane sensor with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Ensure the vane sensor blades are free from dust, debris, or obstructions that could affect rotation and accuracy. Use a soft brush or compressed air if necessary.

Storage

• When not in use for extended periods, remove the battery to prevent leakage and damage to the device.
• Store the anemometer in a cool, dry place, away from direct sunlight and extreme temperatures.

Battery Replacement

• Replace the 9V battery when the low battery indicator appears on the display or if the device fails to power on.
• Follow the battery installation steps outlined in the 'Setup and Assembly' section.

Troubleshooting

This section provides solutions to common issues you might encounter with your Fluke 925 Anemometer.

• Device does not power on:
  • Check if the battery is correctly installed with proper polarity.
  • Replace the 9V battery with a fresh one.
• Inaccurate or erratic readings:
  • Ensure the vane sensor blades are clean and rotate freely without obstruction.
  • Verify the connection between the vane sensor and the display unit is secure.
  • Ensure the vane sensor is positioned correctly in the airflow, facing directly into the flow.
  • Check for strong electromagnetic interference in the measurement area.
• Display is blank or shows error:
  • Check battery level and replace if necessary.
  • Try powering the device off and on again.

Technical Specifications

Warranty and Support

For warranty information, technical support, or service inquiries regarding your Fluke 925 Anemometer, please refer to the official Fluke website or contact Fluke customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.

You can visit the official Fluke Store on Amazon for more information: Fluke Store